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The lower surface of leaf will have more...

The lower surface of leaf will have more number of stomata in a

A

dorsiventral leaf

B

isobilateral leaf

C

boht`(a)`and `(b)`

D

none of these.

Text Solution

Verified by Experts

The correct Answer is:
A
Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves. Usually the lower surface of a dorsiventral (often dicotyledonous) leaf has a greater number of stomata while in an isobilateral (often monocotyledonous) leaf. There are almost equal number of stomata on both surfaces.
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Knowledge Check

  • Go through the following statements. I. High root pressure can cause water to be lost by leaves through the process of guttation. II. Chlorophyll content of leaves will not directly affect transpiration. III. The lower surface of leaf will have more number of stomata in a dorsiventral leaf. IV. Cells shrink in hypotonic solutions and swell in hypertonic solutions. V. Imbibition is a special type of diffusion when water is absorbed by living cells. VI. Most of the water flow in the roots occurs via the symplast. Which of the above statement are incorrect?

    A
    one
    B
    two
    C
    three
    D
    four

  • Assertion : Cuticel is also present in lower epidermal region of the leaf. Reason : The lower epidermis contains a large numbers of stomata.

    A
    If both the assertion and the reason are true and the reason is a correct explanation of the assertion
    B
    If both the assertion and reason are true but the reason is not a correct explanation of the assertion
    C
    If the assertion is true but the reason is false
    D
    If both the assertion and reason are false

  • Assertion In dorsiventral leaf the loss of water from ovwer surface is comparatively muych higher than the upper surface Reason The number of stomata (per unit area) are more in the ower surface than in the upper surface

    A
    If both Assertion and Reason are true and the Reason is a correct expanation of the Assertion
    B
    If both Assertion and Reason re true but Reason is not a correct eplanatin of the Assertion
    C
    If Assertion is true but the Reason is false
    D
    If both Assertion and Reason are false

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